Lagle Corporation has provided the following information:Cost per Unit Cost per PeriodDirect materials$ $4\mathrm{.}80$Direct labor$ $3\mathrm{.}80$Variable manufacturing overhead$ $1\mathrm{.}50$Fixed manufacturing overhead$ $10,800$Sales commissions$ $1\mathrm{.}80$Variable administrative expense$ $0\mathrm{.}60$Fixed selling and administrative expense$ $6,800$If $4,000$ units are sold, the variable cost per unit sold is closest to:$$17\mathrm{.}00$$$12\mathrm{.}50$$$10\mathrm{.}10$$$12\mathrm{.}40$